Since tax year 2020, there is a difference between a License Code (for Desktop) and an Activation Code (for Online). Error code 607 means the code you are entering is invalid. It can be because one digit (or more) is incorrected or you are trying to enter a Code for TurboTax Online in a Desktop software (or vice-versa).
Can you tell us where you bought your product and exactly what it says on the box, if it's a retail purchase?
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